TPF-C Technology Plan - Exoplanet Exploration Program - NASA

Chapter 5
categories, in reality each of the sub-categories contribute to the three main M&MV technology
areas in a distinct manner, as described in the table descriptions for Tables 5-1, 5-2, and 5-3.
Development and Validation of Analysis Tools
This technology area addresses the analysis tools that will be developed and validated in order to
meet the TPF-C modeling needs, as summarized in Table 5-1.
The goal is to develop and verify analytical capabilities required for future analyses of the TPF-C
flight system and testbeds. These include the ability to efficiently and accurately analyze multidisciplinary
systems in an integrated environment, to develop tools to introduce localized nonlinearities
and perform time-dependent and transient temperature-dependent simulations, to
develop approaches to propagate uncertainties from component level to contrast, and to validate
optical analysis tools for diffraction and polarization applications by benchmarking results from
multiple codes.
Characterize and Validate Basic Physics Models
This technology area addresses the need to collect physical data to incorporate into TPF-C
models at the required level of accuracy, as summarized in Table 5-2.
Table 5-1. Development and Validation of Analysis Tools
Technology Description Validation Approach
Integrated
Modeling Tool
e2e simulation of thermal, structural and
optical performance. Includes capability
for multi-disciplinary control and
optimization. Requires improved accuracy
and effectiveness.
Compare closed form and textbook problems
Benchmark with commercial codes
Validate predictions on testbeds
Error Budget and
Performance
Modeling
Error budget allocation process, including
sensitivity flow down and margin
allocation strategy
Validate HCIT error budget, and exercise error
sensitivities and modeling tolerances
Nonlinear
Mechanical
Analysis
Develop analysis tools to incorporate
models of localized non-linearities (e.g.,
hinge/latch, geometric imperfections, and
mirror seal plane micro-cracking), bound
μdynamics, and update models from tests
Validate bounding analyses and system response
predictions on benchmark problems and on
testbeds (Precision Stability Testbed and SM
Tower Testbed)
Optical Analysis
Evaluate existing capability to accurately
model diffraction, polarization, WFSC,
scattered light
Compare benchmark problems on existing
codes: MACOS, Code V
Validate models on HCIT
Uncertainty
Analysis
Develop approach and tools to propagate
analytical errors from model form,
physical parameters, tool accuracy
Develop benchmark problems
Apply and validate results on all testbed models
Verify sensitivity to errors in testbeds.
86